Não informado. (1944). Public Health Economics. University of Michigan, School of Public Health.
Citação do estilo Chicago (17ª ed.)Não informado. Public Health Economics. Ann Arbor, Mich: University of Michigan, School of Public Health, 1944.
Citação MLA (8ª ed.)Não informado. Public Health Economics. University of Michigan, School of Public Health, 1944.
警告:这些引文格式不一定是100%准确.